JP4023186B2 - Blowout prevention container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an easy-open container in which contents that are positively pressurized are stored, and more particularly to a blowout prevention container that prevents the contents from being scattered during initial opening.
[0002]
[Prior art]
In the case where the content is a powdered regular coffee or a liquid filled with liquid nitrogen that has been replaced with gas, gas is generated during storage, and a positive pressure is generated in the container. When the container is an easy-open container, the opening score formed by the lid is broken and opened by the opening tab, but if the container is opened immediately after being shaken or shaken, the initial break is caused by the opening tab. As soon as the contents are broken, the contents erupt vigorously from the broken gap, and the surrounding area may be stained.
[0003]
In order to prevent such spilling, a proposal has been made in the past to attach a filter or filter paper around the fixed portion of the opening tab that is initially fractured, and to escape only the gas during initial opening to prevent the contents from blowing out. (For example, refer to Japanese Utility Model Laid-Open No. 63-144428 and Japanese Patent Laid-Open No. 3-133744).
[0004]
[Problems to be solved by the invention]
However, in the case of the conventional blowout prevention container described above, when the opening tab is slowly lifted, the contents can be prevented from being blown out. However, when the opening tab is lifted vigorously, the filter and the lid cannot be removed. There is a gap between the bodies. There was a problem that the contents were blown out from this gap and the effect of attaching the filter was lost.
[0005]
On the other hand, a technique has also been proposed in which an inner lid is installed inside a container to prevent the contents from being blown out (see Utility Model Registration No. 2510284). The inner lid is elastically fitted to the inner periphery of the body portion of the container main body, and the upper surface is configured to have a tapered shape to be engaged with the convex portion for the safeguard.
However, since the inner lid is only fitted to the inner circumference of the straight body, the mounting position is easily displaced, and the inner lid becomes slanted due to dropping or impact during transportation, and there is a gap between the body parts. And the contents may blow out.
[0006]
The present invention has been made to solve the above-described problems of the prior art, and its object is to prevent the content from being blown out by a filter built in the container body and to support the filter stably. Another object is to provide a blowout prevention container.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the present invention, the contents are stored in the container main body in a positive pressure state, and the opening is broken by the opening tab on the lid that seals the opening of the container main body. In an easy-open container with a score formed,
A filter is provided between the lid in the container body and the contents to allow gas to flow and prevent the contents from flowing, and the body of the container body is radially outward to attach the filter. In a configuration in which a projecting portion that protrudes toward the center is provided, the outer diameter end of the filter is engaged with the mounting recess formed on the inner periphery of the projecting portion, and one score is inserted into the filter to the center .
The filter includes an elastic frame and a filter material attached to the frame. The frame includes a circular outer frame and a rib that supports the outer frame. A circular projection for pinching with a finger is attached to the central portion of the lens, and the mounting recess is arcuate .
The container body is a metal can, and it is preferable that the lid is wound and fixed to the opening end of the metal can.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below based on the illustrated embodiments.
FIG. 1 shows a blowout prevention container according to an embodiment of the present invention.
That is, the blowout prevention container 1 is stored in the container body 2 with the contents 6 in a positive pressure state, and is broken by the opening tab 4 into the metal lid 3 that seals the opening of the container body 2. An opening score of 5 is formed.
The container main body 2 is a bottomed cylindrical metal can, which is composed of a cylindrical barrel portion 21 and a bottom portion 22 that closes the lower end of the barrel portion 21, and the lid 3 is wound and fixed on the upper end of the barrel portion 21. Yes. The lid 3 is for opening the entire surface, the opening score 5 is formed all around the periphery of the lid 3, and the opening tab 4 is fixed to the planned opening portion 30 surrounded by the opening score 5 by the rivet 42. Has been. The opening tab 4 includes a tab nose 41 that extends toward the opening score 5 with respect to the rivet 42, and a finger hook portion 43 that includes a finger hook hole that extends on the opposite side of the opening score 5.
[0009]
Between the lid 3 and the contents 6 in the container main body 2, a filter 7 that allows gas to flow and prevents the contents 6 from flowing is disposed.
The filter 7 shields the entire section of the body portion 21 so as to cover the contents 6 in the container body 2, and is attached to the frame body 71 having elasticity as shown in FIG. 2. The filter material 72 is provided. As a material of the frame 71, for example, polyethylene, polypropylene, or the like can be used. As the filter material 72, various materials such as polyethylene and polypropylene similar to the frame 71, Japanese paper, nylon and the like can be used. The frame 71 includes a circular outer frame 71a and a rib 71b that supports the outer frame 71a. The ribs 71b extend radially from the center, in the illustrated example in a cross shape.
A circular projection 73 for pinching with a finger is attached to the center of the filter 7. The protrusion 73 protrudes from the center of the rib 71b.
[0010]
On the other hand, the body portion 21 of the container body 2 is provided with an annular convex portion 8 projecting radially outward for attaching the filter 7, and an attachment concave portion 81 formed on the inner periphery of the convex portion 8. An outer diameter end portion (outer frame 71a portion) of the filter 7 is engaged.
The convex portion 8 has a shape in which the thin body portion 21 is expanded outward in an arc shape, and the cross-sectional shape of the mounting concave portion 81 on the inner periphery of the convex portion 8 is also an arc shape. The width of the convex portion 8 is several times larger than the thickness of the filter 7, and the outer diameter end of the filter 7 is engaged with the maximum diameter portion of the convex portion 8.
[0011]
It is important that the filter 7 does not come off from the mounting recess 81 due to handling after sealing, transportation, dropping, etc. For that purpose, the dimensional difference X between the diameter D1 of the convex portion 8 and the diameter D0 of the trunk portion 21 is important. It becomes. That is, the diameter of the filter 7 is substantially the same as the diameter D1 of the convex portion 8, the dimensional difference X corresponds to the engagement allowance between the filter 7 and the mounting concave portion 81, and the diameter D1 of the convex portion 8 is the diameter of the can body 21. It is desirable to make it at least +3 mm, preferably +5 to 6 mm larger than D0.
If the diameter D1 of the convex portion 8 becomes too large, it is difficult to fit the filter 7 into the mounting concave portion 81 on the inner periphery of the convex portion 8 or it is difficult to remove it.
In addition, in order to make it easy to attach the filter 7 to the convex portion 8, as shown by a two-dot chain line in FIG. You may comprise so that a diameter may shrink | contract easily.
[0012]
The manufacturing process from filling the contents to sealing is as follows.
1) The empty container body 2 is filled with the contents 6 from the opening.
2) The filter 7 is inserted into the container main body 2 through the opening, and is fitted into the mounting concave portion 81 on the inner periphery of the convex portion 8 of the can body 21 of the container main body 2.
Since the mounting recess 81 has an arc shape, when the filter 7 is pushed to the position of the mounting recess 81, the outer diameter end of the filter 7 automatically settles on the maximum diameter portion of the mounting recess 81 due to its elasticity.
Since the filter 7 is engaged in the mounting concave portion 81 on the inner periphery of the convex portion 8, the filter 7 does not come out of the mounting concave portion 81 when transported or an impact due to dropping is applied.
3) The lid 3 for full opening is wound around the container opening.
At this time, it is desirable to remove oxygen in the container in order to prevent oxidation of the contents. The process at this time uses a gas flow, powder-free dry ice or the like in the process before winding.
[0013]
Next, the opening operation of the blowout prevention container will be described.
That is, as shown in FIG. 3A, when the opening tab 4 is raised, the opening score 5 is initially broken by the tab nose 41 of the opening tab 4, and the gas in the container body 2 is exposed to the outside from the opening gap 31. Exit. At this time, since the gas in the contents also escapes, the contents 6 are scattered by the air flow. However, the scattered contents 6 are captured by the filter 7, and only the gas is released to prevent the contents from being blown out.
After pulling up the opening tab 4 and breaking the lid 3, the filter 7 in the container is taken out. When taking out, the center protrusion 73 is pinched and pulled up. When pulled up, the filter 7 is deformed so that the outer diameter of the filter 7 contracts, and is pulled out from the mounting recess 81, and further taken out from the entire opening 32 of the lid 3. Since the mounting recess 81 has an arc shape, the outer end portion of the filter 7 is gradually contracted when the filter 7 is removed, and can be removed smoothly.
[0014]
In order to protect the cut surface of the lid 3, it is desirable to provide a protective bead (not shown) on the lid. In this way, when the filter 7 is extracted from the entire surface opening 32, the filter does not contact the cut surface of the entire surface opening, and the filter 7 can be extracted smoothly using the beads as a guide.
[0015]
Although the case where the container body 2 is a metal can has been described in the above embodiment, the present invention can be applied not only to a metal can but also to a rigid container such as a glass bottle.
Moreover, although the case where it was set as the cross-section arc shape as a shape of a convex part was demonstrated, it is not limited to an arc shape, It can be set as various shapes, such as a triangle shape, trapezoid shape, and a square shape.
[0016]
【The invention's effect】
As described above, according to the present invention, since the filter that covers the contents is mounted in the container body, only the gas escapes through the filter and the contents are prevented from blowing out even if the filter is opened rapidly. Further, since the filter is mounted in the mounting recess formed on the inner periphery of the convex portion provided on the body portion of the container body, the filter does not fall off even when transported or an impact due to dropping is applied, and the blowout prevention function is not impaired. Furthermore, since the score is put in the filter, the diameter easily contracts when the filter is pushed from the body part to the convex part, and the filter is easily attached to the convex part.
Further, the filter is configured to include a resilient frame and a filter material attached to the frame, and the frame includes a circular outer frame and a rib that supports the outer frame. The center of the rib of the filter is provided with a circular projection for pinching with a finger, so pulling up the knob at the center will deform the frame located at the outer diameter of the filter in a contracting direction, It can be extracted from the mounting recess. Moreover, since the mounting recess has an arc shape, the outer frame gradually contracts and can be pulled out smoothly.
[Brief description of the drawings]
FIG. 1A is a partially cutaway perspective view of a blowing container according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view of the main part of the container of FIG.
FIG. 2 is a plan view of a filter of the container of FIG.
3A is a cross-sectional view of the main part of the container of FIG. 1 in an initial fracture state, and FIG. 3B is a cross-sectional view of the main part when the filter is removed after opening.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Blowout prevention container 2 Container main body, 21 trunk | drum, 22 Bottom part 3 Lid body, 30 Opening opening part, 31 Opening clearance part, 32 Whole surface opening part 4 Opening tab, 41 Tab nose, 42 Rivet 5 Opening score 6 Contents 7 Filter , 71 Frame body, 72 Filter material, 73 Projection, 74 Slit 8 Projection, 81 Mounting recess

Claims (2)

In an easily openable container in which the contents are stored in a positive pressure state inside the container body, and an opening score that is broken by an opening tab is formed on the lid that seals the opening of the container body.
A filter is provided between the lid in the container body and the contents to allow gas to flow and prevent the contents from flowing, and the body of the container body is radially outward to attach the filter. In a configuration in which a projecting portion that protrudes toward the center is provided, the outer diameter end of the filter is engaged with the mounting recess formed on the inner periphery of the projecting portion, and one score is inserted into the filter to the center .
The filter includes an elastic frame and a filter material attached to the frame. The frame includes a circular outer frame and a rib that supports the outer frame. A circular projection for pinching with a finger is attached to the center of the balloon, and the attachment recess is arcuate .   The blowout prevention container according to claim 1, wherein the container body is a metal can, and the lid is wound and fixed to the opening end of the metal can.

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